Drinking a lot of water: good or not, harm and benefit

From this article you will learn:

1. How water works in the human body
2. Clinical causes of constant thirst
3. Why do you want to drink during pregnancy?
4. Consequences of excessive water intake
5. Proper drinking regimen to get rid of constant thirst
6. What water is better to drink

Constant thirst can bring real discomfort, because this symptom increases dryness in the mouth and on the mucous membranes of the lips. In addition, a person’s daily urine volume increases, which is accompanied by frequent urge to go to the toilet.

To stop this endless circle, you need to understand the reasons for the constant desire to drink. It could be about food, bad habits, or it could go much deeper. Let's determine why you want to drink and what needs to be done to normalize the water balance.

How water works in the human body

Water is the basis of life. A person cannot exist without it. A child's body consists of 85% liquid. Over the years, the amount of water gradually decreases, reaching its minimum in old age.

With the participation of fluid, various processes occur in the body: biochemical reactions, digestion, thermoregulation, and more. A person loses water during breathing, through the skin through sweat, as a result of the production of substances in the gastrointestinal tract. Loss of fluid during sleep explains why you are thirsty in the morning.

The liquid takes part in cleansing the body of harmful components that come from food. The kidneys pass blood through themselves, filtering out toxic substances, and excrete them along with urine. All situations associated with loss of fluid explain why the throat becomes dry and thirsty.

Every day a person needs to replenish the lack of fluid in the body. This need is best satisfied by drinking clean water. The body also receives fluid through food. But sometimes this regime is not enough, and even drinking water cannot completely satisfy your thirst. If this happens often, you need to find out why you feel thirsty after drinking water.

This condition can be associated with serious disorders in the body and requires medical intervention. During severe dehydration, which must be quickly compensated, saline solution is administered intravenously.

How water works in the human body

In the human body, fluid is present in two forms: intracellular and extracellular. The first is located in the cell and is separated from its surrounding environment by a membrane. Extracellular fluid is found in the intercellular space, as well as in blood and lymphatic vessels.

For human health, it is important not only to have a sufficient amount of water in the body, but also its harmonious distribution between organs and tissues. How vital systems will function depends on this. If the balance is disturbed, then this is one of the explanations why your mouth becomes dry and thirsty.

How to Tell if You're Excessively Thirsty

Doctors call the insatiable desire to drink Thirst polydipsia.

Polydipsia develops not only due to an objective lack of moisture. Polydipsia can also be caused by excessive activity of the drinking center in the brain, caused, for example, by increased levels of glucose in the blood or malfunctions of the nervous system. In this case, a glass of water will not relieve your thirst.

Here are the symptoms of Thirst polydipsia, indicating disorders in the body:

• thirst haunts you for several days in a row, although you drink a lot of fluid (more than 3 liters per day);
• your urge to urinate has become more frequent;
• a constant desire to drink arose during pregnancy.

Clinical causes of constant thirst

The norms for fluid consumption adopted by different authorities in medicine differ somewhat. In Russia it is believed that you should consume about 30-40 ml per kilogram of weight. During the summer heat it is much more. But rarely does anyone drink such an amount, and water is constantly consumed throughout the day. This explains why you feel thirsty in the evening. In publications you can find a water consumption rate of 1.2-1.5 liters per day. The American Institute of Medicine recommends that men drink 3.7 liters of water per day (20-25% of which comes from food and drinks other than pure water), and women - one liter less.

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WHO has adopted other standards for water consumption per day:

• men – 2.9 l;
• women – 2.2 l.

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In fact, everything is very individual. Each person has their own fluid needs.

Why do you want to drink and how can you find out that you need to replenish the lack of fluid? The drinking center in the nervous system, which consists of the nuclei of the posterior lobe of the hypothalamus, the limbic sections of the cerebral hemispheres and some areas of their cortex, is responsible for the thirst signal. If thirst is constantly present, this indicates a malfunction in the functioning of this center.

The drinking center controls the water content in all body systems, osmotic pressure, and Na+ levels in the liquid. It is he who determines the reasons why you want to drink more. Monitoring is carried out by the hypothalamus. Responses occur reflexively, and hormones of the renin-angiotensin-aldosterone system are involved: vasopressin (produced by the hypothalamus), angiotensin (formed in the blood), renin (secreted by the kidneys), aldosterone (secreted by the adrenal cortex). Thyroid and pancreatic hormones are also necessary to regulate fluid levels in the body.

Why do you often want to drink water? Drinking water in itself is not a disease. Doctors pay attention to excessive thirst, which may be a symptom of pathology.

Clinical causes of constant thirst

Most often, the reasons why the mouth is dry and thirsty are such painful conditions as:

• chronic diarrhea;
• constant vomiting;
• increased body temperature;
• brain injuries;
• infection;
• internal or external bleeding, capillary loss syndrome;
• diabetes mellitus (hyperglycemia);
• diabetes insipidus (not related to insulin) of neurogenic, nephrogenic or dipsogenic origin.

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Frequent urination and a condition that makes a person thirsty can be caused by:

• various lesions of the hypothalamus (for example, a tumor), which disrupts the formation of the antidiuretic hormone vasopressin, which is responsible for water-electrolyte metabolism;
• a decrease in osmolality in the blood plasma (the amount of anions, cations and non-electrolytes);
• low sensitivity (or lack thereof) of renal tubular receptors to vasopressin.

The following conditions may also indicate why you are always thirsty:

• chronic renal failure (nephropathy, pyelonephritis, amyloidosis, etc.);
• thyrotoxicosis (hyperparathyroidism);
• primary hyperaldosteronism or Conn's syndrome (caused by hyperplasia of the adrenal cortex and increased production of aldosterone, causes a deficiency of potassium ions - hypokalemia);
• hypohydration with edema;
• hyperhidrosis (excessive sweating);
• hypercalcemia;
• hyponatremia;
• hypercortisolism syndrome (Itsenko-Cushing syndrome);
• adrenal adenoma and adrenocortical cancer.

Clinical reasons for constant thirst
The answer to the question of why you constantly want to drink water may be hidden in such congenital pathologies as acromegaly (appears due to a malfunction of the anterior pituitary gland), aceruloplasminemia, Bartter's syndrome (impaired absorption of chlorides and sodium by the kidneys), cystinosis, Parhon syndrome, Fanconi syndrome, sickle cell anemia. Only a doctor can tell you why your lips are dry and thirsty.

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Taking a course of treatment with certain medications, such as diuretics, antibiotics, antipsychotic drugs, explains why you are constantly thirsty and have a dry mouth.

You need to drink water - 5 reasons

When analyzing the reasons when it is necessary to consume large amounts of liquid, it is worth thinking about the benefits. Only informed decisions will allow you to maintain health and avoid harmful consequences. What looks affirming and believable:

A vital necessity

If you don't drink at all for 4 days, you can lose your life. Water is primary for the functioning of the entire body. It ensures proper functioning of the brain, cardiovascular and excretory systems. Flushes away harmful compounds and toxic substances. Saliva is also moisture and requires the necessary replenishment to produce digestive compounds. Blood also needs water for good circulation.

Maintaining a slim figure

There are no calories in water, and for this reason it is popular in getting rid of extra pounds. Essentially, drinking a glass of liquid tricks the brain. Receptors and nerves transmit information from the stomach that it is full. For some time, the feeling of hunger will subside. As a result, the amount of food eaten decreases and the length of time between meals increases. Drinking cold water can speed up metabolic processes. To generate heat for the body, you need to take calories from fat deposits.

3. Skin turgor

The skin is the most voluminous human organ, with a high moisture content. Dehydration is detrimental to the epidermis. The surface layers become dry, flaccid, with many wrinkles. This is especially significant for women. Drinking clean, fresh water guarantees beauty, youth, and healthy skin. In addition, it is necessary to use protective creams to avoid rapid evaporation of liquid from the upper layers of the skin.

Keeping muscles toned

Human muscles are tissues that are in dire need of sufficient water supply. This allows them to work at full capacity and avoid various injuries. If there is insufficient supply of fluid to the internal organs, it begins to be compensated from muscle tissue. This situation should concern people involved in sports. They should constantly replenish the water reserves of their organs.

Proper bowel function

Another important reason why you need to drink raw water is the healthy functioning of the gastrointestinal tract. Drinking liquid in the morning causes the intestinal walls to contract intensively, promoting the bolus. As a result, constipation, bloating and other problems disappear. You can drink mineral water after consulting your doctor. He will help you choose a brand based on its composition and determine the dosage.

Why do you want to drink during pregnancy?

During pregnancy, women are advised to increase their daily water intake by 300 ml. At the same time, you should not drink more than two liters per day, as this increases the load on the kidneys. Why do pregnant women want to drink?

In the third trimester of pregnancy, there is often an increased production of the protein angiotensinogen in the liver and its release into the blood, which is the reason why a woman is always thirsty. The feeling of thirst is also affected by the production of corticosteroids and estrogen, and changes in the composition of minerals.

When a child grows and develops in the womb, a woman’s glomerular filtration rate of the kidneys accelerates, which experience increased load. The hormone angiotensin plays an important role in this. It is its action that explains why your mouth becomes dry and thirsty.

An increase in the production of the hormone angiotensin during the gestational period stimulates the synthesis of aldosterone, which is produced in the adrenal cortex. As a result of these biochemical processes, a large number of sodium ions are retained in the blood, and potassium ions are excreted. It is the influence of these substances that explains why your throat dries out and you feel thirsty.

Why do you want to drink during pregnancy?

Only a doctor can determine why you are always thirsty. After a detailed interview with the patient and tests, the specialist will make the correct diagnosis. All the nuances of the body’s condition are taken into account - the number of trips to the toilet, diet, and more.

A person must undergo tests to determine why he wants to drink water and has dry mouth:

• blood test to determine plasma glucose (including on an empty stomach);
• blood test for the amount of potassium, calcium and sodium (osmotic concentration);
• blood chemistry;
• general urine analysis;
• urine analysis for relative density.

Depending on the research results, you may need to visit an endocrinologist, hematologist, nephrologist, who will tell you why you really want to drink water. You may need to do a CT or MRI of the brain, kidneys, and adrenal glands.

Consequences of excessive water intake

A person cannot take in more than one liter of fluid per hour. This is exactly how much the kidneys can pass through. Few people take this amount of water, but in some cases this happens.

If you drink more than 4-5 liters a day, the body expects the following consequences:

• excessive load on the kidneys;
• acceleration of protein breakdown;
• increased sweating;
• imbalance of minerals and salts;
• Reducing stomach acid and slowing down digestion.

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Drinking a lot of water is dangerous for people who have chronic liver and kidney diseases. Excess fluid will put additional stress on the organs and damage them.

Proper drinking regimen to get rid of constant thirst

Don’t think that you will make up for the lack of water in your body by drinking any drinks or eating liquid food. Juices, fruit drinks, compotes, tea and coffee, as well as soups are not considered liquids. The human body regards them as food and expends energy on digesting them.

Why do you want to drink after eating? For the normal functioning of all organs and systems, clean water in optimal quantities is needed.

Proper drinking regimen to get rid of constant thirst

The main recommendations if you are concerned about why you want to drink in the evening:

1. Drink a glass of water 30 minutes before meals.
2. Use purified liquid, but not boiled.
3. You should not drink water while eating.
4. Increase fluid intake during exercise, in hot weather, during pregnancy and breastfeeding, and during poisoning or infection.

When thirst is normal

There are many relatively healthy reasons for Thirst that make you thirsty.

• Physical activity, such as vigorous exercise.
• Heat.
• Eating salty or spicy foods.
• Non-compliance with drinking regime.
• Too much alcohol or caffeinated drinks.
• A cold or other illness that is accompanied by a high (over 38 °C) temperature.
• Vomiting or diarrhea.
• Skin burns - from thermal to solar.
• Blood loss, including 10 Unexpected Reasons Why You're Thirsty All the Time with heavy menstruation.
• Taking certain medications. For example, diuretics (diuretics) or antipsychotics.

It's normal to be thirsty. If the thirst subsides after you swallow a glass of water or even two or three, and does not return for several hours, you are fine.

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